What is the Wavelength? - 2

Question

Help with this question. What is the wavelength? What is the wavelength in meters of an electromagnetic wave whose frequency is 2.07 x 10^12 s^-1?

Answer 1

c = λν

c = speed of light ≈ 3x108 m/s

λ = wavelength = ?

ν = frequency = 2.07x10¹² s^-1

Solving or λ

λ = 3x10⁸ ms^-1 / 2.07x10¹² s^-1

λ = 1.45x10^-4 m